Area of a Segment of a Circle
Definition: The number of square units it takes to fill a
of a circle
Try this Drag one of the orange dots that define the endpoints of the segment.
Note the number of square units it takes to fill it.
The formula to find the area of the segment is given below. It can also be found by calculating the area of
the whole pie-shaped sector and subtracting the area of the
isosceles triangle △ACB.
Formula for the area of a segment of a circle
Other circle topics
Equations of a circle
Angles in a circle
(C) 2009 Copyright Math Open Reference. All rights reserved